Definition: You are given a question on clinical knowledge. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The chain of survival has four links. Put the following list in the correct order: 1. Early defibrillation; 2. Early CPR; 3. Recognition and call for help early; 4. Post-resuscitation care.
(A)3, 1, 2, 4. (B)3, 2, 1, 4. (C)1, 2, 3, 4. (D)2, 1, 3, 4.

B